Mechanism for



(No Model.)

J. s. DETRIOK Mechanism for Applying Power to Sewing Machines.

Patented Aug. 3,1880.

17; 1/6 h on 7 CAM "J 6&4.

Witnesses.- I

Adam

N. PETERS, PHDTO-LITHOGRAPH ER. WASHINGTON. D C

FFrcE.

JACOB S. DETRIOK, ()F BALTIMORE, MARYLAND.

MECHANISM FOR APPLYING POWER TO SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 230,695, dated August3, 1880. Application filed April 'J, 1880. (No model.)

To all whom it may concern:

Be it known that I, JACOB S. DETRICK, a citizen of the United States,residing at Baltimore, in the county of Baltimore and State of Maryland,have invented certain new and useful Improvements in Mechanism forApplying Power to Sewing-Machines and other Light Machines; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same, reference being had to theaccompanying drawings, and to letters or figures of reference markedthereon, which form a part of this specification.

My invention has particularly for its object to provide means forovercoming certain difliculties in applying motive power tosewingmachines or other light machines used in factories where themachines are run by power other than the foot-treadle.

By means of the combination of mechanism hereinafter describcd the speedof the machine may be varied and the machine may be stopped almostinstantly.

In the drawings hereto annexed,Figure 1 is a front view of asewing-machine to which my device is applied. Fig. 2 is a side view ofsame. Fig. 3 is a section of the swinging wheel and the slide-shaft.Fig. 4 is a cross section view of same.

The letter A designates the table; B, the sewing-machine; 0, itsdrive-pulley. D designates the main shaft, driven by power; E, standardssupporting a shaft, f, which carries a hollow cone-pulley, G. Thispulley is driven by a belt, h, over a pulley on the main shaft.

The hollow cone-pulley may he faced internally with leather or othermaterial, as at i, to prevent the pulley J, hereinafter described, fromslip inng, and in the present instance said pulley Gr constitutes thedriving-pulley of the mechanism.

A rock-shaft, k, is suspended in bearings n at the lower side of thetable and directly below the drive-pulley c, which is above, and saidshaft carries an arm, 9, rigidly secured thereto, and at one end aright-angle lever, L, is pivoted so as to'have mmement on the pivot inthe direction of the length of the shaft. By pivoting the lever to theend of the shaft the long arm will swing as the shaft rocks; but saidlever may be pivoted to a hanger separate from the shaft, and so as topermit it to swing, if desired. Two arms, q, are keyed or made fast tothe rock-shaft, and form a swing which supports a slide-shaft, r,

on one end of which the beveled pulley J is secured. The shaft r has afeather, s, (see Figs.

3 and 4,) and carries the pulley N, the hub n of which is bored out soas to permit the shaft to slide through it, and a straight groove,'t, iscut through the bore.

It is obvious the construction might be reversed-t. 0., the groove cuton the shaft and the feather formed in the bore of the hub. As the hubfits between the arms q of the swing the pulley N is thereby preventedfrom lateral movement; but the feather and the groove permit the shaft1" to slide endwise through the hub, whereby the position of the beveledpulley J may be shifted so as to have it bear against the interior conedriving-pulley G at any point from its inner to its outermost extrcm ity.

At the other end of the slide-shaft one arm of the right-angle lever Lis connected in such manner as not to interfere with the rotation of theshaft, and to the other arm of the same lever a rod, a, is attached,which rod is oper- 8o ated by the treadle V. From the arm 1) a rod, W,depends, and is operated by the trcadle m.

A stationary brake, y, is supported in any suitable manner in suchposition that when the toe part of the treadle w is depressed the pulleyN will thereby be swung against 11 9 brake, causing the machine to stopalmost instantly.

By the construction herein described the machine is started bydepressing the heel part of the treadle .00, thereby bringing thebeveled pulley J in contact with the hollow cone-pulley.

The speedis varied by means of the treadle o. The depression of the toepart of the treadle has the eifect to slide the shaft 1* toward the 3hollow cone G, which brings the beveled pulley J at that point of thehollow cone where the diameter is smallest and the speed imparted to thebeveled pulley is lessened. The depression of the heel part of thetreadlemoves' the beveled pulley in the opposite direction, and itscontact with the hollow cone is at that point where the latters diameteris largest and the speed of the beveled pulleyis increased.

7 and desire to secure by Letters Patent of the United States- 1. Thecombination of the pulley N, a horizontal rotary shaft, 1', adapted bymeans of a groove and feather, arranged substantially as described, topermit the shaft to slide through the hub of the pulley, a right-angledlever having one arm connected to the shaft in such manner as to permitthe latter to rotate, arod, it, connected to the other arm of the lever,and a treadle, as set forth.

2. The combination of the horizontal rockshaft 70 having an arm, 1), arotary shaft suspended from the rock-shaft by arms q, a pulley mountedon the rotary shaft between the arms and secured by means of a grooveand feather, a treadle, 00, a rod connecting the arm on the rock-shaftwith the treadle, a rightangled lever having one arm connected to therotary shaft, a treadle, V, and a rod connect in g the other arm of thelever with the treadle, 'as set forth.

3. The combination of a horizontal rockshaft, it, having an arm, arotary shaft suspended from the rock-shaft by arms q, a pulley mountedon the rotary shaft between the arms, a treadle, w, a rod connecting thearm on the rock-shaft with the treadle, and a stationary brake placedopposite the pulley, as shown and described.

4. In mechanism for varying speed, a hollow funnel-shaped pulley, G,having internal straight sloping sides, and a bevel-faced pulley, J,having the bevel to correspond with the slope of the internal shape ofthe hollow pulley and of lesser size than the smallest internal part ofsaid pulley, as shown and described.

5. In mechanism for varying speed, a hollow funnelshaped pulley, G,having internal straight sloping sides, and a bevel-faced pulley, J,having the bevel to correspond with the slope of the internal shape ofthe hollow pulley, a horizontal shaft on which one of said pulleys ismounted, a pulley, N, mounted on the shaft, and secured by meanssubstantially as described, whereby the shaft may slide through the hubof the pulley, as set forth.

6. In mechanism for varying speed, a hollow funnel-shaped pulley, G,having internal straight sloping sides, and a bevel-faced pulley, J,having the bevel to correspond with the slope of the internal shape ofthe hollow pulley, a horizontal shaft on which one of said pulleys ismounted, a pulley, N, mounted on the shaft, and secured by meanssubstantially as described, whereby the shaft may slide through the hubof the pulley, and a lever con nccted to the shaft lll such manner as iopermit the latter to rotate, as set forth.

In testimony whereof I allix my signz'iture in presence of twoudtmzsses.

Vitnesses CHAS. 1-3. M ANN, JNO. 'J. lWADDOX.

